In this paper I draw a distinction between a special and a general version of the Gettier problem. I argue that the special problem is partially a logical problem, as well as an epistemological one, and I show that it is very easy to solve. This is interesting, since most of the Gettier-style examples that appear in the literature fall under the special problem, and hence as they stand they too are very easy to solve.

Nós tentamos mostrar neste ensaio que as propostas anulabilistas de Peter Klein e de Marshall Swain não resolvem o problema de Gettier. Klein postula que, para qualquer contra-exemplo de tipo-Gettier, há uma proposição verdadeira que, ao ser conjugada com a evidência e de S, anula de modo legítimo a justificação de p para S. Swain postula que, para qualquer contra-exemplo de tipo-Gettier, há uma proposição verdadeira que, ao ser conjugada com o conjunto de razões R de (...) S, anula de modo ulterior a justificação de S para crer que p. Para provarmos que essas propostas não resolvem aquele problema, apresentamos dois contra-exemplos de tipo-Gettier para os quais não há anuladores legítimos da justificação de p por e para S, nem anuladores da justificação da crença de S de que p por R que não sejam ulteriormente anulados. Após a discussão em torno dos anulabilismos de Klein e de Swain, tentamos mostrar que as conclusões nela obtidas podem ser corretamente aplicadas a qualquer proposta anulabilista de conhecimento. DOI:10.5007/1808-1711.2010v14n2p175. (shrink)

The Gettier Problem (henceforth GP) is a milestone in contemporary epistemology. Half a century after the philosophical earthquake caused by the well-known Gettier article (1963), solutions continue to appear and the discussion resurfaces. Because we, like many, choose to adopt an optimistic stance towards the possibility of finding a plausible answer to the GP, in this paper we present an unconventional solution to solve it. Crucially, we argue that the only plausible and non-falsifiable definition of the propositional knowledge (...) is the one given by an “open” formula that contains a placeholder or a “variable” – on the third necessary condition – which takes a value according to which, depending on the circumstances, is necessary and sufficient for epistemic success. (shrink)

In this essay, we intend to show that Peter Klein and Marshall Swain defeasibility theories do not resolve the Gettier problem. Klein postulates, to any Gettier counterexample, that there is a true proposition which, when associated with evidence-e of S, genuinely defeats the justification of p to S. Swain postulates that, to any Gettier-type counterexample, there is a true proposition which, when associated with the set of reasons-R of S, ultimately defeats the justification of S to believe (...) p. To show that Klein an Swain proposals do not resolve that problem, this essay presents two Gettier-type counterexamples for which there are no genuine defeaters of justification of p by e to S and there are no defeaters not ultimately defeated of the justification of the belief of S that p by R. After doing that, we try to show that the obtained conclusion regarding Klein and Swain defeasibility theories can be extended to any defeasibility theory of knowledge. • DOI:10.5007/1808-1711.2010v14n2p175. (shrink)

Edmund Gettier is Professor Emeritus at the University of Massachusetts, Amherst. This short piece, published in 1963, seemed to many decisively to refute an otherwise attractive analysis of knowledge. It stimulated a renewed effort, still ongoing, to clarify exactly what knowledge comprises.

Russian translation of Gettier E. L. Is Justified True Belief Knowledge? // Analysis, vol. 23, 1963. Translated by Lev Lamberov with kind permission of the author.

[ES] En este breve trabajo, se presenta una edición bilingüe de Is Justified True Belief Knowledge?, de Edmund L. Gettier, donde se presentan contraejemplos a la definición de «conocimiento» como «creencia verdadera justificada». [ES] In this brief text, a bilingual edition of Is Justified True Belief Knowledge?, by Edmund L. Gettier, some counterexamples are presented to the definition of «knowledge» as «justified true belief».

[ES] En este breve trabajo, se presenta una edición bilingüe de Is Justified True Belief Knowledge?, de Edmund L. Gettier, donde se presentan contraejemplos a la definición de «conocimiento» como «creencia verdadera justificada». [ES] In this brief text, a bilingual edition of Is Justified True Belief Knowledge?, by Edmund L. Gettier, some counterexamples are presented to the definition of «knowledge» as «justified true belief».

Conhecimento e sorte parecem dois conceitos excludentes, isto é, em ordem de atribuirmos conhecimento a alguém, tal sucesso cognitivo deve excluir elementos de sorte da aquisição intelectual. Entretanto, desde o artigo de Edmund Gettier “Is Justified True Belief Knowledge?” (1963), tem se reconhecido cada vez mais a envergadura que elementos de sorte assume no conhecimento, a ponto de chegarmos a uma conclusão cética no campo epistemológico. A questão que fica, então, é como solucionar a atribuição de conhecimento, com fatores (...) de sorte praticamente onipresentes. Dito isso, o objetivo do trabalho será dois: (i) primeiro, irei expor os desdobramentos do debate da sorte epistêmica, ou seja, mostrar sua amplitude, classificações, conceituação e algumas respostas ao problema. Após (ii) pretendo argumentar sobre as vantagens de se abordar a sorte epistêmica fora do campo proposicional a partir de uma abordagem da epistemologia das virtudes que foque em outros bens epistêmicos além da crença verdadeira. (shrink)

Ernest Sosa's latest epistemology remains a version of virtue epistemology, and I argue here that it faces two central problems, pressing a point I have made elsewhere, that virtue epistemology does not present a complete answer to the problem of the value of knowledge. I will press this point regarding the nature of knowledge through variations on two standard Gettier examples here. The first is the Fake Barn case and the second is the Tom Grabit case. I will argue (...) that Sosa's latest virtue epistemology fails to handle either case acceptably, and that as a result, cannot explain the value that knowledge has over that of the sum of any of its proper subparts. La última epistemología de Ernest Sosa continúa siendo una versión de epistemología de las virtudes, y siguiendo con una idea que ya planteé en otra parte, aquí argumento que afronta dos problemas centrales: que la epistemología de las virtudes no presenta una respuesta completa al problema del valor del conocimiento. Insistiré en esta idea sobre la naturaleza del conocimiento mediante variaciones de dos ejemplos estándares tipo Gettier. El primero es el caso del granero falso y el segundo es el caso de Tom Grabit. Argumentaré que la última epistemología de las virtudes de Sosa no maneja ninguno de estos casos de forma aceptable, y en consecuencia no puede explicar el valor que tiene el conocimiento por encima del de la suma de cualesquiera de sus propias partes. (shrink)

Este trabajo da claras respuestas rigurosas a las cuestiones fundamentales de la epistemología, siendo estas: -/- * ¿Qué es el conocimiento? * ¿Cómo difiere el conocimiento declarativo del conocimiento procedimental? * ¿Cómo se diferencia el conocimiento intuitivo forma ¿conocimiento discursivo? * ¿Cómo difiere el conocimiento científico de los conocimientos no científicos? * ¿Cuál es la diferencia entre el descubrimiento y la justificación? * ¿Cuál es la naturaleza de nuestro conocimiento del pasado, del futuro, de lo meramente posible, y del presente (...) pero no perceptible? * ¿Cómo es el conocimiento conceptual diferente del conocimiento empírico? * ¿todo el conocimiento es inferencial? * ¿todo el conocimiento es teórico? * ¿todo el conocimiento inferencial es teórico? * ¿es la mente transparente para sí misma? * ¿es coherente el concepto de ideación inconsciente? * ¿Cuál es el problema de Gettier y cuál es la solución al problema de Gettier? -/- Este libro es apropiado para principiantes y también para los investigadores. (shrink)

Esta é uma análise de um item do “externalismo de função própria” de Alvin Plantinga. A seguir, exponho o argumento de Peter Klein, contra o conceito de autorização [warrant] de Plantinga, no qual é mostrado por que ela não contém condições suficientes para o conhecimento, bem como as reações de Plantinga, nas quais se verifica um aprimoramento da mesma teoria. Sugiro uma avaliação teórica dos conteúdos propostos e exponho revisitas à condição do ambiente cognitivo, enfocada no debate. Proponho, ao final, (...) uma resolução do problema, restrita aos termos da teoria de autorização por função própria. PALAVRAS-CHAVE – Autorização epistêmica. Acidentalidade. Problemas de Gettier. Externalismo. Função própria. Ambiente cognitivo. ABSTRACT This is an analysis of an aspect of Alvin Plantinga’s “proper function externalism”. I expound Peter Klein’s argument against Plantinga’s concept of warrant, where it is shown why it doesn’t contain sufficient conditions for knowledge, as well as Plantinga’s reactions, where an improvement of the same theory is put forward. I propose a theoretical evaluation of the views in question and discuss recent analyses of the condition of cognitive environment, which is one of the focal points of the debate. Finally, I propose a resolution to the problem within the confines of the proper function theory of warrant. KEY WORDS – Epistemic warrant. Accidentality. Gettier problems. Externalism. Proper function. Cognitive environment. (shrink)

O texto aproxima e interpreta duas análises realizadas, em 1964, por Ernest Sosa: uma relativa à noção de ‘obediência' (em texto antes de difícil acesso e agora publicado nesta Revista) e outra à noção de ‘conhecimento de que p' (em texto recolhido por Sosa em seu livro Knowledge in perspective, mas em versão parcial). Em ambos os casos, vemos a clara influência do problema de Gettier para a reflexão de Sosa. A palavra chave aqui é ‘análise', por meio (...) da qual, entre outros recursos, podemos reconhecer a relevância e a singularidade da reflexão de Sosa entre os filósofos analíticos contemporâneos, inclusive ao tomá-la como um corpus teórico, como uma obra, passível então de exame, tanto por suas posições mais atuais, quanto por sua história e démarche. (shrink)

RESUMO Ernest Sosa é um dos mais importantes filósofos da contemporaneidade. Em plena atividade há mais de cinco décadas, sua obra toma agora a forma de uma teoria da normatividade télica, com a qual Sosa pretende coroar sua procura por uma "knowledgefriendly epistemology". Pretendemos mostrar que esta nova forma teórica instala-se bem no conjunto de sua reflexão epistemológica, procurando Sosa agora, de modo ainda mais preciso, dar resposta, por exemplo, às questões decorrentes do problema de Gettier, da intencionalidade (...) e das modalidades epistêmicas. Entre as novidades de sua atual formulação, analisaremos de modo mais específico neste texto alguns problemas colocados pelo exemplo do arqueiro, ao transformar-se este em um modelo teórico ilustrativo da noção de normatividade télica, bem como alguns aspectos da singular taxonomia do conhecimento feita por Sosa. ABSTRACT Ernest Sosa is one of the most outstanding philosophers in our contemporaneity. Working intensively for over five decades, his work now takes the form of a theory of telic normativity with which he intends to crown his search for a "knowledge friendly epistemology". We intend to show that this new theoretical form is well settled in the whole of his epistemological reflection, being Sosa interested now in providing, more precisely, an answer, for instance, to questions derived from Gettier’s problem, from intentionality, and from epistemic modalities. Among the innovations of his present formulation, we shall analyze, more specifically in this text, some problems expressed through the archer’s example, when it turns to be an illustrative theoretical model of the telic normative notion, as well as some aspects of Sosa’s singular taxonomy of knowledge. (shrink)

It has been pointed out that Gettier case scenarios have deviant realizations and that deviant realizations raise a difficulty for the logical analysis of thought experiments. Grundmann and Horvath have shown that it is possible to rule out deviant realizations by suitably modifying the scenario of a Gettier-style thought experiment. They hypothesize further that the enriched scenario corresponds to the way expert epistemologists implicitly interpret the original one. However, no precise account of this implicit enrichment is offered, which (...) makes the proposal somewhat ad hoc. Drawing on pragmatic theory, I argue that the content of Grundmann and Horvath’s modified scenario corresponds to the default interpretation of the original scenario and that epistemological expertise is not required to access the deviance-proof interpretation. This Default Interpretation proposal offers thus a more general and independently motivated solution to the Problem of Deviant Realizations. (shrink)

This article examines whether people share the Gettier intuition (viz. that someone who has a true justified belief that p may nonetheless fail to know that p) in 24 sites, located in 23 countries (counting Hong Kong as a distinct country) and across 17 languages. We also consider the possible influence of gender and personality on this intuition with a very large sample size. Finally, we examine whether the Gettier intuition varies across people as a function of their (...) disposition to engage in “reflective” thinking. (shrink)

This article examines whether people share the Gettier intuition (viz. that someone who has a true justified belief that p may nonetheless fail to know that p) in 24 sites, located in 23 countries (counting Hong-Kong as a distinct country) and across 17 languages. We also consider the possible influence of gender and personality on this intuition with a very large sample size. Finally, we examine whether the Gettier intuition varies across people as a function of their disposition (...) to engage in “reflective” thinking. (shrink)

When philosophers try to understand the nature of knowledge, they have to confront the Gettier problem. This problem, set out in Edmund Gettier's famous paper of 1963, has yet to be solved, and has challenged our best attempts to define what knowledge is. This volume offers an organised sequence of accessible and distinctive chapters explaining the history of debate surrounding Gettier's challenge, and where that debate should take us next. The chapters describe and evaluate a wide range (...) of ideas about knowledge that have been sparked by philosophical engagements with the Gettier problem, including such phenomena as fallibility, reasoning, evidence, reliability, truth-tracking, context, luck, intellectual virtue, wisdom, conceptual analysis, intuition, experimental philosophy, and explication. The result is an authoritative survey of fifty-plus years of epistemological research - along with provocative ideas for future research – into the nature of knowledge. (shrink)

The orthodox view in contemporary epistemology is that Edmund Gettier refuted the JTB analysis of knowledge, according to which knowledge is justified true belief. In a recent paper Moti Mizrahi questions the orthodox view. According to Mizrahi, the cases that Gettier advanced against the JTB analysis are misleading. In this paper I defend the orthodox view.

I challenge a cornerstone of the Gettier debate: that a proposed analysis of the concept of knowledge is inadequate unless it entails that people don’t know in Gettier cases. I do so from the perspective of Carnap’s methodology of explication. It turns out that the Gettier problem per se is not a fatal problem for any account of knowledge, thus understood. It all depends on how the account fares regarding other putative counter examples and the further Carnapian (...) desiderata of exactness, fruitfulness and simplicity. Carnap proposed his methodology more than a decade before Gettier’s seminal paper appeared, making the present solution to the problem a candidate for being the least ad hoc proposal on the market, one whose independent standing cannot be questioned, among solutions that depart from the usual method of revising a theory of knowledge in the light of counterexamples. As an illustration of the method at work, I reconstruct reliabilism as an attempt to provide an explication of the concept of knowledge. (shrink)

We report experimental results showing that participants are more likely to attribute knowledge in familiar Gettier cases when the would-be knowers are performing actions that are negative in some way (e.g. harmful, blameworthy, norm-violating) than when they are performing positive or neutral actions. Our experiments bring together important elements from the Gettier case literature in epistemology and the Knobe effect literature in experimental philosophy and reveal new insights into folk patterns of knowledge attribution.

Do laypeople and philosophers differ in their attributions of knowledge? Starmans and Friedman maintain that laypeople differ from philosophers in taking ‘authentic evidence’ Gettier cases to be cases of knowledge. Their reply helpfully clarifies the distinction between ‘authentic evidence’ and ‘apparent evidence’. Using their sharpened presentation of this distinction, we contend that the argument of our original paper still stands.

In this article, we present evidence that in four different cultural groups that speak quite different languages there are cases of justified true beliefs that are not judged to be cases of knowledge. We hypothesize that this intuitive judgment, which we call “the Gettier intuition,” may be a reflection of an underlying innate and universal core folk epistemology, and we highlight the philosophical significance of its universality.

The possibility of justified true belief without knowledge is normally motivated by informally classified examples. This paper shows that it can also be motivated more formally, by a natural class of epistemic models in which both knowledge and justified belief (in the relevant sense) are represented. The models involve a distinction between appearance and reality. Gettier cases arise because the agent's ignorance increases as the gap between appearance and reality widens. The models also exhibit an epistemic asymmetry between good (...) and bad cases that sceptics seem to ignore or deny. (shrink)

Let mathematical justification be the kind of justification obtained when a mathematician provides a proof of a theorem. Are Gettier cases possible for this kind of justification? At first sight we might think not: The standard for mathematical justification is proof and, since proof is bound at the hip with truth, there is no possibility of having an epistemically lucky justification of a true mathematical proposition. In this paper, I argue that Gettier cases are possible (and indeed actual) (...) in mathematical reasoning. By analysing these cases, I suggest that the Gettier phenomenon indicates some upshots for actual mathematical practice. (shrink)

In the classical account of knowledge, S knows that P if and only if S believes that P, S is justified in believing that P, and P is true (JTB).. In 1963, Gettier presented two problems that casted doubt on this account. Since then, numerous authors proposed modifications or clarifications of JTB, however, these efforts have not produced a satis-factory solution. In this paper, the focus is on logical properties of justification. The Get-tier problem Case II is expressed in (...) sentential logic and Gettier Minimal Assumption (GMA) is introduced. It is shown that Gettier must have used GMA or some other as-sumption that entails GMA in his construction of Case II. Rejection of GMA solves Get-tier problem Case II and it is a step towards a better understanding of the logical proper-ties of justification and knowledge. (shrink)

The term “Gettier Case” is a technical term frequently applied to a wide array of thought experiments in contemporary epistemology. What do these cases have in common? It is said that they all involve a justified true belief which, intuitively, is not knowledge, due to a form of luck called “Gettiering.” While this very broad characterization suffices for some purposes, it masks radical diversity. We argue that the extent of this diversity merits abandoning the notion of a “Gettier (...) case” in a favour of more finely grained terminology. We propose such terminology, and use it to effectively sort the myriad Gettier cases from the theoretical literature in a way that charts deep fault lines in ordinary judgments about knowledge. (shrink)

Previous research in experimental philosophy has suggested that moral judgments can influence the ordinary application of a number of different concepts, including attributions of knowledge. But should epistemologists care? The present set of studies demonstrate that this basic effect can be extended to overturn intuitions in some of the most theoretically central experiments in contemporary epistemology: Gettier cases. Furthermore, experiment three shows that this effect is unlikely mediated by a simple desire to blame, suggesting that a correct psychological account (...) of ordinary knowledge attribution may include moral judgment. (shrink)

In 1967, Alvin Goldman prominently claimed that the traditional JTB analysis is adequate for non-empirical knowledge. Since then, this claim has remained widely unchallenged. In this paper, I show that this claim is false. I provide two examples in which a true belief is a priori justified but epistemically defective such that it does not constitute knowledge. Finally, I submit a novel analysis of a priori knowledge that avoids the Gettier problem. What is particularly important and distinctive about my (...) analysis is that I neither need to make the justification condition so strong that only infallible justification is allowed, nor do I need to explicitly introduce a truth condition. (shrink)

In this chapter, we will explore the luck at issue in Gettier-styled counterexamples and the subsequent problem it poses to any viable reductive analysis of knowledge. In the 1st section, we will consider the specific species of luck that is at issue in Gettier counterexamples, then, in the next section, I will briefly sketch a diagnosis of the Gettier Problem and try to explain why the relevant species of luck has proven to be extremely difficult to avoid. (...) And finally, I will consider a prominent objection to the proposed diagnosis of the Problem. (shrink)

To what extent should we trust our natural instincts about knowledge? The question has special urgency for epistemologists who want to draw evidential support for their theories from certain intuitive epistemic assessments while discounting others as misleading. This paper focuses on the viability of endorsing the legitimacy of Gettier intuitions while resisting the intuitive pull of skepticism – a combination of moves that most mainstream epistemologists find appealing. Awkwardly enough, the “good” Gettier intuitions and the “bad” skeptical intuitions (...) seem to be equally strong. This chapter argues that it is not a coincidence that these two types of intuition register with equal force: they are generated by a common mechanism. However, the input to this mechanism is interestingly different in the two types of case, and different in a way that can support the mainstream view that Gettier cases tell us something about knowledge where skeptical intuitions involve systematic error. (shrink)

This is a discussion of the Gettier problem and its relation to epistemic luck.

A critical review of “Gettier” cases and theoretical attempts to solve “the” "Gettier" "problem".

Gettier problems or cases are named in honor of the American philosopher Edmund Gettier, who discovered them in 1963. They function as challenges to the philosophical tradition of defining knowledge of a proposition as justified true belief in that proposition. The problems are actual or possible situations in which someone has a belief that is both true and well supported by evidence, yet which — according to almost all epistemologists — fails to be knowledge. Gettier’s original article (...) had a dramatic impact, as epistemologists began trying to ascertain afresh what knowledge is, with almost all agreeing that Gettier had refuted the traditional definition of knowledge. They have made many attempts to repair or replace that traditional definition of knowledge, resulting in several new conceptions of knowledge and of justificatory support. In this respect, Gettier sparked a period of pronounced epistemological energy and innovation — all with a single two-and-a-half page article. There is no consensus, however, that any one of the attempts to solve the Gettier challenge has succeeded in fully defining what it is to have knowledge of a truth or fact. So, the force of that challenge continues to be felt in various ways, and to various extents, within epistemology. Sometimes, the challenge is ignored in frustration at the existence of so many possibly failed efforts to solve it. Often, the assumption is made that somehow it can — and will, one of these days — be solved. Usually, it is agreed to show something about knowledge, even if not all epistemologists concur as to exactly what it shows. (shrink)

This chapter contains sections titled: Gettier Situations A Counter‐Example to ‘Gettier's Official Result’ Ordinary Gettiered Knowledge A Meta‐Gettier Problem Objections Answered Gettier‐Luck as Veritic Luck? Gettier‐Luck is not Veritic Luck Gettier‐Luck is Combinatorial Luck Combinatorial Luck: Applications Knowing in a Combinatorially Lucky Way Gettier‐Holism Versus Gettier‐Partialism Combinatorial Safety Combinatorial Gradational Safety Epistemological Privilege and Epistemological Empathy Gettier Situations and Sceptical Situations Timothy Williamson.

How should intellectualists respond to apparent Gettier-style counterexamples? Stanley offers an orthodox response which rejects the claim that the subjects in such scenarios possess knowledge-how. I argue that intellectualists should embrace a revisionary response according to which knowledge-how is a distinctively practical species of knowledge-that that is compatible with Gettier-style luck.

This article argues that justified true beliefs in Gettier cases often are not true due to luck. I offer two ‘unlucky’ Gettier cases, and it's easy enough to generate more. Hence even attaching a broad ‘anti‐luck’ codicil to the tripartite account of knowledge leaves the Gettier problem intact. Also, two related questions are addressed. First, if epistemic luck isn't distinctive of Gettier cases, what is? Second, what do Gettier cases reveal about knowledge?

The possibility of justified true belief without knowledge is normally motivated by informally classified examples. This paper shows that it can also be motivated more formally, by a natural class of epistemic models in which both knowledge and justified belief are represented. The models involve a distinction between appearance and reality. Gettier cases arise because the agent's ignorance increases as the gap between appearance and reality widens. The models also exhibit an epistemic asymmetry between good and bad cases that (...) sceptics seem to ignore or deny. (shrink)